Patent GB-189712883-A (GB)
Title: Improvements in Nailing Machines chiefly designed for use in the Manufacture of Boots and Shoes.
Inventor: GODDU LOUIS HENRY
Filed: 1897-05-25
Granted: 1897-07-24
Abstract: 12,883. Goddu, L. H. May 25. Nailing nails.-Relates to nailing-machines, chiefly for use in the manufacture of boots and shoes, in which the nails are cut from a continuous length of wire and driven by a driver which also serves the purpose of an awl. The wire feed is such that the lengths of nails cut may be uniform or may be varied to suit the thickness of the work. Two work feeds and work-supports are provided, one for use when the nails are driven regularly, and the other for use when the nails are arranged in an irregular manner to form designs known as quilting. Fig. 14 shows a part of the upper portion or head of the machine. The wire a<90> is fed downwards between a fixed block a' and a roughened roller a, which is rotated by a ratchet-wheel and a pawl carried by an arm a<7> on a spindle which can be rotated by a lever actuated by a cam and spring (not shown). When nails of uniform length are to be used, the wire is fed by a uniform amount at each actuation of the ratchet, the motion of the ratchet-actuating lever being limited by an adjustable stop bearing on the framing of the machine ; but when the lengths of the nails are to be automatically varied, to suit the thickness of the work, the motion of the feed-ratchet is limited by a movable bevelled stop connected with the verticallysliding horn or work support in such a way that the position of the stop, and consequently the amount of the feed, will be determined by the extent to which the horn moves upwards to bring the work into position for nailing. To enable the feed-mechanism to be adjusted for different sizes of wire, the feed-roller is mounted on an eccentric bearing which can be rotated. The wire is fed through a guide a<15> and into a vertical throat in a fixed plate a<22>, and is then cut off between a fixed cutter a<25> and a movable cutter a<18> actuated by a lever a<3> moved by a cam on the main shaft. The shape of the cutters is such that the upper end of the nail is cut flat, but a \/-shaped point is left on the wire for the next nail. After the nail is cut off, the wire guide a<15> is withdrawn from above the throat by means of the cam-actuated lever a<3>, and the driver a<33>, actuated by a cam on the main shaft, then descends and drives the nail. The driver next ascends, the work is fed forward, and the driver descends by the action of the cam a further distance than before, in order to prick a hole in the work for the next nail. This being done, the lever a<3> returns the wire guide for cutting off the next nail. The work is supported on a horn adjustable on a vertically-movable horn shaft which is pressed up by a spring, and is lowered at each revolution of the driving-shaft by means of a cam and intermediate linkwork, through a distance greater than is necessary to permit of the feed of the work and sufficient to enable the work to be taken off or placed upon the horn. When the horn is at its lowest point, the driving-shaft may be automatically stopped by means of a brake acting on a disc which is keyed to the driving-shaft, and which is clutched to the driving-pulley which runs loose on the shaft, the clutch being automatically operated simultaneously with the brake by a wedge arrangement connected by linkwork with the horn. The feed of the work, when the nailing is regular, is effected by a feed-arm c on a lever which can be moved longitudinally on its pivot to press the arm c on the work, and which can then be rotated on its pivot to feed the work forward, both motions being effected by suitable cams and the lever being brought back by a spring. When, however, irregular nailing for quilting is required, the feed-arm c is moved out of use and the work is fed partly by hand and partly by an awl working inside a hollow post which is used as a work-support instead of the horn. This awl is actuated by a lever with a cam surface inside the post in conjunction with a spring- actuated sleeve sliding on the post, and the mechanism, already described, for moving the horn shaft.